In the Heliocentric Model,retrograde Motion Occurs When

Multiple Choice

In the heliocentric model,retrograde motion occurs when:

A) a planet travels along an epicycle in the opposite sense of its usual orbit.
B) Earth is moving along its orbit on the opposite side of the Sun from another planet.
C) a planet's velocity changes as it moves nearer to or farther from the Sun.
D) Earth catches and passes another planet in its orbit.